Moynihan Train Hall is the head house that sits atop the western end of Pennsylvania Station, the main intercity and commuter rail station in New York City. Located in the city's former main post office building, the James A. Farley Building, the train hall occupies an entire city block between Eighth Avenue, Ninth Avenue, 31st Street, and 33rd Street in Midtown Manhattan. The annex provides new access to most of Penn Station's platforms for Amtrak and Long Island Rail Road passengers, serving 17 of the station's 21 tracks. The hall is named after Daniel Patrick Moynihan, the U.S. senator who had originally championed the plan. The building's Beaux-Arts exterior resembles that of the original Penn Station; both buildings were designed by the architectural firm of McKim, Mead & White.